Answer:
Molar mass = 27 g/mol
Explanation:
Given data;
Number of moles of Al = 0.2 mol
Mass of Al = 5.4 g
Molar mass of Al = ?
Solution:
Formula:
Number of moles = mass/molar mass
By putting values,
0.2 mol = 5.4 g/ molar mass
Molar mass = 5.4 g/ 0.2 mol
Molar mass = 27 g/mol
<u>Answer:</u> Enzymes enhances the rate in the same order.
<u>Explanation:</u>
Catalyzed reactions are defined as the reactions in which a catalyst is used.
A catalyst is a substance which increases the rate of the reaction and does not participate in the reaction. It can be recovered at the end of the reaction. It decreases the activation energy of the reaction.
The rate of catalyzed reactions is always greater than the rate of uncatalyzed reactions.
Enzymes are the natural catalysts which are present in the animal body to increase the rate of some reactions.
Thus, they enhance the rate of both slow and fast uncatalyzed reaction at the same rate.
The answer to this question would be: 2.36 mol
To answer this question, you need to know the molecular weight of copper. Molecular weight determines how much the weight of 1 mol of a molecule has. Copper molecular weight about 63.5g/mol. Then, the amount of mol in 150g copper should be: 150g / (63.5g/mol)= 2.36 mol
Answer:
0.075 is the mole fraction for HCl
Explanation:
Mole fraction = Moles of solute or solvent / Total moles
Total moles = moles of solute + moles of solvent
In this solution:
HCl is the solute
H₂O is the solvent
4.50 m means molal, 4.50 moles of HCl in 1kg of water.
Let's determine the moles of water
1000 g . 1mol/18 g = 55.5 moles
Total moles = 4.50 + 55.5 = 60.05 moles
Mole fraction of HCl = 4.50 / 60.05 → 0.075
Answer:
A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.
Explanation: